Quantum proposal error handling [1/1]

Merging this fix from pebbles/master into mesa 1.6

This change causes the quantum proposal to perform a validation check
upon apply when GRE mode is selected. It fails the apply (red flashing dot
in the GUI) and displays an error message in the GUI that indicates that the
os_sdn network needs to be defined.


 crowbar.yml                                     |    2 ++
 crowbar_framework/app/models/quantum_service.rb |    4 ++++
 2 files changed, 6 insertions(+)

Crowbar-Pull-ID: 21506d63e7e8c7ecf46de0b6e365678d2b331973

Crowbar-Release: mesa-1.6